Code copy freebsd development manual http://shouce.jb51.net/freebsd-developers-handbook/sockets-essential-functions.html

 # include & lt; Stdio. H> 
#include  
#include  

#include  
#include  

#include  

# define BACKLOG 6 

Int main (int arg c, char * argv []) {

The register int s_sock_fd c_sock_fd; 
Struct sockaddr_in s_addr c_addr; 
The FILE * client; 

Int port=8080; 
Unsigned int ca_len; 

If ((s_sock_fd=socket (PF_INET SOCK_STREAM, 0)) & lt; 0 {
Perror (" socket error. \ n "); 
return 1; 
} 

Bzero (& amp; S_addr, sizeof (s_addr)); 

S_addr. Sin_family=AF_INET; 
S_addr. Sin_port=htons (port); 
If (INADDR_ANY) 
S_addr. Sin_addr. S_addr=htonl (INADDR_ANY); 

If (bind (s_sock_fd, (struct sockaddr *) & amp; S_addr, sizeof (s_addr)) & lt; 0 {
Perror (" bind error. \ n "); 
Return 2; 
} 

The switch (the fork ()) {
Case 1: 
Perror (" fork error. \ n "); 
Return 3; 
break; 
Default: 
Close (s_sock_fd); 
return 0; 
break; 
Case 0: 
break; 
} 

Listen (s_sock_fd, BACKLOG); 

For (;; ) {
Ca_len=sizeof (c_addr); 
If ((c_sock_fd=accept (s_sock_fd, (struct sockaddr *) & amp; C_addr, & amp; Ca_len) & lt; 0 {
Perror (" accept the error. \ n "); 
The return of 4; 
} 

If ((client=fdopen (c_sock_fd, "w")) & lt; 0 {
Perror (" fdopen error. \ n "); 
Return 5; 
} 

Fprintf (client, "& lt; Html> . . " ); 
The fclose (the client); 
} 
} 

CodePudding user response:

The

reference

if (INADDR_ANY)
S_addr. Sin_addr. S_addr=htonl (INADDR_ANY);

INADDR_ANY value is 0, write the???